Shuang Hou , Dingtao Ma , Yanyi Wang , Kefeng Ouyang , Sicheng Shen , Hongwei Mi , Lingzhi Zhao , Peixin Zhang
{"title":"一种用于锌离子电池的原位自蚀刻高功率电极","authors":"Shuang Hou , Dingtao Ma , Yanyi Wang , Kefeng Ouyang , Sicheng Shen , Hongwei Mi , Lingzhi Zhao , Peixin Zhang","doi":"10.1016/j.jechem.2023.09.029","DOIUrl":null,"url":null,"abstract":"<div><p>Sluggish storage kinetics is considered as the main bottleneck of cathode materials for fast-charging aqueous zinc-ion batteries (AZIBs). In this report, we propose a novel in-situ self-etching strategy to unlock the Palm tree-like vanadium oxide/carbon nanofiber membrane (P-VO/C) as a robust free-standing electrode. Comprehensive investigations including the finite element simulation, in-situ X-ray diffraction, and in-situ electrochemical impedance spectroscopy disclosed it an electrochemically induced phase transformation mechanism from VO to layered Zn<em><sub>x</sub></em>V<sub>2</sub>O<sub>5</sub>⋅<em>n</em>H<sub>2</sub>O, as well as superior storage kinetics with ultrahigh pseudocapacitive contribution. As demonstrated, such electrode can remain a specific capacity of 285 mA h g<sup>−1</sup> after 100 cycles at 1 A g<sup>−1</sup>, 144.4 mA h g<sup>−1</sup> after 1500 cycles at 30 A g<sup>−1</sup>, and even 97 mA h g<sup>−1</sup> after 3000 cycles at 60 A g<sup>−1</sup>, respectively. Unexpectedly, an impressive power density of 78.9 kW kg<sup>−1</sup> at the super-high current density of 100 A g<sup>−1</sup> also can be achieved. Such design concept of in-situ self-etching free-standing electrode can provide a brand-new insight into extending the pseudocapacitive storage limit, so as to promote the development of high-power energy storage devices including but not limited to AZIBs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 399-408"},"PeriodicalIF":14.0000,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An in-situ self-etching enabled high-power electrode for aqueous zinc-ion batteries\",\"authors\":\"Shuang Hou , Dingtao Ma , Yanyi Wang , Kefeng Ouyang , Sicheng Shen , Hongwei Mi , Lingzhi Zhao , Peixin Zhang\",\"doi\":\"10.1016/j.jechem.2023.09.029\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Sluggish storage kinetics is considered as the main bottleneck of cathode materials for fast-charging aqueous zinc-ion batteries (AZIBs). In this report, we propose a novel in-situ self-etching strategy to unlock the Palm tree-like vanadium oxide/carbon nanofiber membrane (P-VO/C) as a robust free-standing electrode. Comprehensive investigations including the finite element simulation, in-situ X-ray diffraction, and in-situ electrochemical impedance spectroscopy disclosed it an electrochemically induced phase transformation mechanism from VO to layered Zn<em><sub>x</sub></em>V<sub>2</sub>O<sub>5</sub>⋅<em>n</em>H<sub>2</sub>O, as well as superior storage kinetics with ultrahigh pseudocapacitive contribution. As demonstrated, such electrode can remain a specific capacity of 285 mA h g<sup>−1</sup> after 100 cycles at 1 A g<sup>−1</sup>, 144.4 mA h g<sup>−1</sup> after 1500 cycles at 30 A g<sup>−1</sup>, and even 97 mA h g<sup>−1</sup> after 3000 cycles at 60 A g<sup>−1</sup>, respectively. Unexpectedly, an impressive power density of 78.9 kW kg<sup>−1</sup> at the super-high current density of 100 A g<sup>−1</sup> also can be achieved. Such design concept of in-situ self-etching free-standing electrode can provide a brand-new insight into extending the pseudocapacitive storage limit, so as to promote the development of high-power energy storage devices including but not limited to AZIBs.</p></div>\",\"PeriodicalId\":67498,\"journal\":{\"name\":\"能源化学\",\"volume\":\"88 \",\"pages\":\"Pages 399-408\"},\"PeriodicalIF\":14.0000,\"publicationDate\":\"2023-10-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"能源化学\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2095495623005442\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"能源化学","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2095495623005442","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
摘要
快速充电水性锌离子电池(AZIBs)正极材料的主要瓶颈是存储动力学缓慢。在本报告中,我们提出了一种新的原位自蚀刻策略,以解锁棕榈树状氧化钒/碳纳米纤维膜(P-VO/C)作为坚固的独立电极。通过有限元模拟、原位x射线衍射和原位电化学阻抗谱等综合研究,揭示了由VO到层状ZnxV2O5⋅nH2O的电化学诱导相变机制,以及具有超高赝电容贡献的优异存储动力学。结果表明,该电极在1 a g - 1下循环100次后的比容量为285 mA h g - 1,在30 a g - 1下循环1500次后的比容量为144.4 mA h g - 1,在60 a g - 1下循环3000次后的比容量为97 mA h g - 1。出乎意料的是,在100 A g−1的超高电流密度下,也可以实现令人印象深刻的78.9 kW kg−1的功率密度。这种原位自蚀刻独立电极的设计理念可以为扩展假电容存储极限提供全新的见解,从而促进包括但不限于azib在内的大功率储能器件的发展。
An in-situ self-etching enabled high-power electrode for aqueous zinc-ion batteries
Sluggish storage kinetics is considered as the main bottleneck of cathode materials for fast-charging aqueous zinc-ion batteries (AZIBs). In this report, we propose a novel in-situ self-etching strategy to unlock the Palm tree-like vanadium oxide/carbon nanofiber membrane (P-VO/C) as a robust free-standing electrode. Comprehensive investigations including the finite element simulation, in-situ X-ray diffraction, and in-situ electrochemical impedance spectroscopy disclosed it an electrochemically induced phase transformation mechanism from VO to layered ZnxV2O5⋅nH2O, as well as superior storage kinetics with ultrahigh pseudocapacitive contribution. As demonstrated, such electrode can remain a specific capacity of 285 mA h g−1 after 100 cycles at 1 A g−1, 144.4 mA h g−1 after 1500 cycles at 30 A g−1, and even 97 mA h g−1 after 3000 cycles at 60 A g−1, respectively. Unexpectedly, an impressive power density of 78.9 kW kg−1 at the super-high current density of 100 A g−1 also can be achieved. Such design concept of in-situ self-etching free-standing electrode can provide a brand-new insight into extending the pseudocapacitive storage limit, so as to promote the development of high-power energy storage devices including but not limited to AZIBs.